src/osx/carbon/bmpbuttn.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        src/osx/carbon/bmpbuttn.cpp
   3 // Purpose:     wxBitmapButton
   4 // Author:      Stefan Csomor
   5 // Modified by:
   6 // Created:     1998-01-01
   7 // RCS-ID:      $Id$
   8 // Copyright:   (c) Stefan Csomor
   9 // Licence:     wxWindows licence
  10 /////////////////////////////////////////////////////////////////////////////
  11
  12 #include "wx/wxprec.h"
  13
  14 #if wxUSE_BMPBUTTON
  15
  16 #include "wx/bmpbuttn.h"
  17 #include "wx/image.h"
  18
  19 #ifndef WX_PRECOMP
  20     #include "wx/dcmemory.h"
  21 #endif
  22
  23 #include "wx/osx/private.h"
  24
  25 namespace
  26 {
  27
  28 // define a derived class to override SetBitmap() and also to provide
  29 // InitButtonContentInfo() helper used by CreateBitmapButton()
  30 class wxMacBitmapButton : public wxMacControl
  31 {
  32 public:
  33     wxMacBitmapButton(wxWindowMac* peer, const wxBitmap& bitmap, int style)
  34         : wxMacControl(peer)
  35     {
  36         // decide what kind of contents the button will have: we want to use an
  37         // icon for buttons with wxBORDER_NONE style as bevel buttons always do
  38         // have a border but icons are limited to a few standard sizes only and
  39         // are resized by the system with extremely ugly results if they don't
  40         // fit (in the past we also tried being smart and pasting a bitmap
  41         // instead of a larger square icon to avoid resizing but this resulted
  42         // in buttons having different size than specified by wx API and
  43         // breaking the layouts and still didn't look good so we don't even try
  44         // to do this any more)
  45         m_isIcon = (style & wxBORDER_NONE) &&
  46                         bitmap.IsOk() && IsOfStandardSize(bitmap);
  47     }
  48
  49     virtual void SetBitmap(const wxBitmap& bitmap)
  50     {
  51         // unfortunately we can't avoid the ugly resizing problem mentioned
  52         // above if a bitmap of supported size was used initially but was
  53         // replaced with another one later as the control was already created
  54         // as an icon control (although maybe we ought to recreate it?)
  55         ControlButtonContentInfo info;
  56         InitButtonContentInfo(info, bitmap);
  57
  58         if ( info.contentType == kControlContentIconRef )
  59             SetData(kControlIconPart, kControlIconContentTag, info);
  60         else if ( info.contentType != kControlNoContent )
  61             SetData(kControlButtonPart, kControlBevelButtonContentTag, info);
  62
  63         wxMacReleaseBitmapButton(&info);
  64     }
  65
  66     void InitButtonContentInfo(ControlButtonContentInfo& info,
  67                                const wxBitmap& bitmap)
  68     {
  69         wxMacCreateBitmapButton(&info, bitmap,
  70                                 m_isIcon ? kControlContentIconRef : 0);
  71     }
  72
  73 private:
  74     // helper function: returns true if the given bitmap is of one of standard
  75     // sizes supported by OS X icons
  76     static bool IsOfStandardSize(const wxBitmap& bmp)
  77     {
  78         const int w = bmp.GetWidth();
  79
  80         return bmp.GetHeight() == w &&
  81                 (w == 128 || w == 48 || w == 32 || w == 16);
  82     }
  83
  84
  85     // true if this is an icon control, false if it's a bevel button
  86     bool m_isIcon;
  87
  88     wxDECLARE_NO_COPY_CLASS(wxMacBitmapButton);
  89 };
  90
  91 } // anonymous namespace
  92
  93 wxWidgetImplType* wxWidgetImpl::CreateBitmapButton( wxWindowMac* wxpeer,
  94                                     wxWindowMac* parent,
  95                                     wxWindowID WXUNUSED(id),
  96                                     const wxBitmap& bitmap,
  97                                     const wxPoint& pos,
  98                                     const wxSize& size,
  99                                     long style,
 100                                     long WXUNUSED(extraStyle))
 101 {
 102     wxMacBitmapButton* peer = new wxMacBitmapButton(wxpeer, bitmap, style);
 103
 104     OSStatus err;
 105     WXWindow macParent = MAC_WXHWND(parent->MacGetTopLevelWindowRef());
 106     Rect bounds = wxMacGetBoundsForControl( wxpeer, pos, size );
 107
 108     ControlButtonContentInfo info;
 109     peer->InitButtonContentInfo(info, bitmap);
 110
 111     if ( info.contentType == kControlContentIconRef )
 112     {
 113         err = CreateIconControl
 114               (
 115                 macParent,
 116                 &bounds,
 117                 &info,
 118                 false,
 119                 peer->GetControlRefAddr()
 120               );
 121     }
 122     else // normal bevel button
 123     {
 124         err = CreateBevelButtonControl
 125               (
 126                 macParent,
 127                 &bounds,
 128                 CFSTR(""),
 129                 style & wxBU_AUTODRAW ? kControlBevelButtonSmallBevel
 130                                       : kControlBevelButtonNormalBevel,
 131                 kControlBehaviorOffsetContents,
 132                 &info,
 133                 0,  // menu id (no associated menu)
 134                 0,  // menu behaviour (unused)
 135                 0,  // menu placement (unused too)
 136                 peer->GetControlRefAddr()
 137               );
 138     }
 139
 140     verify_noerr( err );
 141
 142     wxMacReleaseBitmapButton( &info );
 143     return peer;
 144 }
 145
 146 #endif // wxUSE_BMPBUTTON